[Node.js] Add a message which notify that the generated server doesn't work (#456)

* Add message which notify that the server doesn't work

* Update samples

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/NodeJSServerCodegen.java

@@ -57,6 +57,18 @@ public class NodeJSServerCodegen extends DefaultCodegen implements CodegenConfig
     public NodeJSServerCodegen() {
         super();
 
+        StringBuilder message = new StringBuilder();
+        message.append(System.lineSeparator()).append(System.lineSeparator())
+                .append("=======================================================================================")
+                .append(System.lineSeparator())
+                .append("Currently, Node.js server doesn't work as its dependency doesn't support OpenAPI Spec3.")
+                .append(System.lineSeparator())
+                .append("For further details, see https://github.com/OpenAPITools/openapi-generator/issues/34")
+                .append(System.lineSeparator())
+                .append("=======================================================================================")
+                .append(System.lineSeparator()).append(System.lineSeparator());
+        LOGGER.warn(message.toString());
+
         // set the output folder here
         outputFolder = "generated-code/nodejs";
 

samples/server/petstore/nodejs/.openapi-generator/VERSION

@@ -1 +1 @@
-3.0.0-SNAPSHOT
+3.1.0-SNAPSHOT